Valve mechanism



Se t. 21 1926. I

T. F. CHEEK VALVE MECHANISM original Filed Dec. 1, 1922 MAIN sx/Musr' Tom)! Chm Ottawa,

Patented Sept. 21, 1926.

UNITED STATES PATENT OFFICE.

TOLBERT F. CHEEK, OF NEW YORK, N. Y., ASSIGNOR TO WELTE-MIGNON CORPORA- TION, OF NEW YORK, N. Y., A CORPORATION OF NEWV YORK.

VALVE MECHANISM.

Application filed December 1, 1922, Serial No. 604,212. Renewed August 11, 1926.

This invention relates to valve mechanism and is particularly adapted for use in connection with expression mechanism such as shown in the patent to Velte & Bockisch, No. 1,008,291.

The primary object of this invention is the provision in a record controlled musical instrument, of an improved valve mechanism which has a valve which is under con trol of the record and which will remain operated until a separate control means is operated.

Another object of my invention is the provision of an improved valve mechanism which is provided with a valve, a connection for supplying atmospheric pressure to control the operation of the valve in one direction and a separate atmospheric connection for causing the operation of the valve in another direction.

Another and further object of my invention is the provision of an improved valve mechanism comprising a valve operated by a pneumatic, means for causing the valve to remain operated whether or not its operating pneumatic remains operated and improved means for causing the valve to return to its initial position.

Another and further object of my invention is the provision of an improved means for cutting off an air passage or duct.

Another and still further object of my invention is the provision of a control valve mechanism for expression mechanisms of record controlled musical instruments wherein a valve is under control of a pneumatic, operated from a tracker duct and which will remain operated until upon operation of another record controlled device the pneumatic is caused to be deflated thereby permitting the valve to return to its initial position.

Another and still further object of my in vention is the provision of a valve control mechanism which comprises a pneumatic for operating the valve when pressure is applied thereto, a device for continuously supplying pressure thereto and operated by the valve even though the first supply of pressure is cut off, a separate means for cutting off the supply of pressure before the valve is moved toward its initial position.

Still another object of my invention is the provision of such an improved valve control mechanism which can be all installed in two thin blocks, thus saving much space and making a device which is easily constructed and easily repaired and cleaned.

Referring to the drawing where I have illustrated an embodimentof my invention,

The figure illustrates a diagrammatic sketch of my invention applied to an expression device of an automaticmusical instrument.

1O designates the wind chest of the regulator, 11, the regulator pneumatic, 12 the regulator valve, 13 the inlet from the wind chest and 14 the outlet to the main exhaust supply 15. A passage 16 connects the chamber 17 and gives communication to the interior of the regulator pneumatic 11. The air in passing from the chamber 17, passes the valve 12 through the duct 18 to the chamber 19 and into the duct 14. The valve 12 is suitably connected to the regulator 11, as, for example, by the chain or cable 20 over the pulley 21 which moves with the movable member of the expression pneumatic 22. When the illustrated connection is employed, the valve 12 is normally held to the left, in the drawing, by the spring 12*. This expression pneumatic 22 is controlled in its movements by pressure supplied through the ducts 24, 25 and 26.

A stop pneumatic 27 carries a stop member 28 which interrupts movement of the expression bellows by the contact with the engaging member 29 when the pneumatic 27 is collapsed.

A duct 30 leads from the stop pneumatic 27 to the chamber 31 of the valve control mechanism. \Vithin the chamber 31 is a valve 32 which has a stem 33 which extends through the port 34 into the chamber 35. The chamber 31 is covered with a cap 36 having a port 37 which connects to the atmosphere through the felt cover 38. From the chamber 31 extends a duct 39 which leads to a chamber 40.

On one side of the chamber 40 is a pouch pneumatic 41 which separates the chamber 40 from the chamber 42. At one side of the pouch member 41 and connecting the chambers 40 and 42 together is a bleed 43 which acts to bleed the chamber 42 and its duct 44 which connects to an opening 45 in the tracker bar 46.

Oppositethe pneumatic 41 is a pouch 47 which covers the openings of two ducts 48 and 49 and when in raised position, as shown in the drawing, furnishes a continuous pas- 'tion of the rendition of the music.

sage between the ducts et8 and t9. The correlation of the pouch l7 and the pouch pneumatic 41 is such that when the pouch pneumatic 4-1 is inflated, with atmospheric pressure through the duct l 1 and exhaust in the chamber it), the pouch pneumatic will press downward on the pouch e7 thereby cutting oli communication between the duct; 18 and L9.

Below the valve stem 38 is a primary pouch pneumatic which is in position to move the valve stem 3-3 and the valve 32 upwardly when the chamberSZ) is exhausted through the duct 51 and atmospheric pressure is admitted to the chamber f2. The duct 49 is connected to the chamber 52 and is connected to the chamber through the bleed '53. Communicating also with the chamber 52 is the duct 5% which leads to an opening in the-tracker bar 46. A I will 110w describe the operation or my invention. Suppose, tor example, that it 'was desired to hold the stop pneumatic 27 in collapsed position for a certain por- The opening 55, of the duct-5et, would be opened by the registration therewith of an opening in the record. This would permit the entry of atmospheric pressure to the duct 54. Prior to this admission of iir to the duct 5%, the latter, the chamber 52 and the duct if) were exhausted by the bleed 53, the entry 0t air to the duct 49 being prevented by the presence of the atmosphere inthe chamber 40 from duct 39, chamber 31 and port'37.

The entry of atmospheric pressure in the chamber 52 causes the lifting of the pouch '50, thereby raising; the valve stem -33 and the valve 32. The valve 32, when it is raised,

opens the chamber 31 to the influence oi the exhaust in chamber 35, through the ,port Immediately thereafter, the atmospheric portS'? is closed by the valve 32 and the air is exliaiistecl from the chamber 40, duct 39, chamber 31, du'ct'SO and pneumatic 9? cansing the collapse of the latter. lVhen the chamber 40 is exhausted, the pouch 47 is raised, thereby connecting the duct 49 with the outside air pressure through the duct 48. The pouch 41 is prevented from hav- 'ing any ettect upon the pouch 4-7 because of the fact that the air in the chamber 12 is immediately removed through the bleed Now if the perforation, whichpcrmittec air toenter the duct fishshould ,pass the opening no change takes placev as the atmospheric pressure enterinp the duct it from the duct 48 is su'liicient to more than overcome the exhaust action of the bleed 53, and the pouch 50 and the valve 32-continue to be held in raised position.

At the end of the period which it is desired to have the pneumatic 27 remain in collapsed position, the sheet is perforated the duct permits the bleed 53 to erhaust the air tr ii the ducts 19 and 5s: and the chamber T2. This causes the pouch 5t) and the valve 32 to tall, closing the port 3t and opening the ductil? to atmospheric pressure, which latter enters the chamber 311, duct and pneumatic 27. The pneumatic 2 then expands under the action ot-the spring 56.

It is to he understood that this valve mechanism could be duplicated wherever it was desired to hold a pneumatic under sustained exhaust, as, for instance, the expression pneumatic the movement of which is controlled through the ducts 2t, 25 and 26. The valve block is separable along a line between the two pieces as shown in the drawing.

il hile T have described and shown in detail an en'ibodiment of my invention, 1 dcsire to have it understood that I do not limit liyselt to the exact showing and that modili ations and changes may be made witnout departing- Etrom the spirit of my invention and within the scope of the appended claims.

Having described my invention, what I claim is 1. A record controlled musicalinstrument i comprising a tracker, a pneumatic, a main source of tension, a valve for controlling the connection of the main source of tension with the pneumatic, .a primary pneumatic in position to move the valve, :1 connection from the tracker to admit atmospheric pressure to the primary pneumatic,

A record controlled musical instrument omprising a tracker, a pneumatic. a main source of tensioiua valve for controlling the connection of the main source oft tension with the pneumatic, a primary pneumatic in position to move the valve-a connection from the tracker to admit pressure to the primary pneumatic, pneumatic means controlled by the operationo't the valve-to counect the primary pneumatic with a source 0t pressure, and means including; a separate connection to thetracker to control the con nection with the source ofpressure.

A record controlled musica instrument comprising a tracker. a pneumatic, a main source of tension, a valve for controlling thrconn action of the main source of tension with the pneumatic, a primary pneumatic in posi tion to move the valve, a connection to the tracker for controlling the operation of the primary pneumatic, means independent of the tracker connection to maintain the pri mary pneumatic in operated position, and pneumatic means independent of the valve and having a separate connection to the tracker for controlling the return of the pri-- mary pneumatic to inoperative position.

4. A record controlled musical instrument comprising a tracker, a pneumatic, a main source of tension, a valve for controlling the connection of the main source of tension'with the pneumatic, power means, comprising a control connection to the tracker, for moving the valve, means for maintaining the power means in operated position and means, independent of the valve, for returning the power means to inoperative condition.

5. A record controlled musical instrun'ient comprising a tracker, a pneumatic, a main source of tension, a valve for controlling the connection of the main source of tension with the pneumatic, power means, comprising a control connection to the tracker, for moving the valve, means for maintaining the power means in operated position and means, independent of the valve, for returning the power means to inoperative condition, said last named means comprising a connection to the tracker independent of the first men tioned tracker connection.

6. A record controlled musical instrument comprising a tracker, a pneumatic, a main source of tension, a valve for controlling the connection of the main source of tension with the pneumatic, a chamber having constant and uninterrupted communication with the pneumatic, pneumatic devices, comprising a tracker communication, for controlling the movement of the valve in one direction and a pneumatic means under the influence of the pressure in the chamber for maintaining the valve in operated position.

7. A record controlled musical instrument comprising a tracker, a pneumatic, a main source of tension, a valve for controlling the connection of the main source of tension with the pneumatic, a chamber having constant and uninterrupted communication with the pneumatic, pneumatic device's, comprising a tracker communication, for controlling the movement of the valve in one direction, a pneumatic means under the influence of the chamber for maintaining the valve in operated position, and a tracker controlled pneumatic for overcoming the influence ot' the pneumatic means.

8. A record controlled musical instrument comprising a tracker, a pneumatic, a main source of tension, a valve for controlling the connection of the main source of tension with the pneumatic, a chamber having constant and uninterrupted communication with the pneumatic, pneumatic devices, comprising a tracker communication, for controlling the movement of the valve in one direction, a pouch in the chamber and connections to the pneun'iatic devices for controlling the pressure to hold the same in operative position, said connections being controlled by the position of the pouch.

9. A record controlled musical instrument comprising a tracker, a pneumatic, a main source of tension, a va, ve for controlling the connection of the main source of tension with the pneumatic, a chamber having constant and uninterrupted communication with the pneun'iatic, pneumatic devices, compris ing a tracker communication, for controlling the movement of the valve in one direction, a pouch in the chamber and connections to the pneumatic devices for controlling the pressure to hold the pouch in operative position, said connections being controlled by the position of the pouch and a tracker controlled pneumatic for overcoming the control of the pouch over the connections.

10. A record controlled musical instrument comprising a tracker, a pneumatic, a main source of tension, a valve for controlling the connection of the main source of tension with the pneumatic, a chamber, pneumatic devices for controlling the movement of the valve in one direction and connections for causing a change in pressure in the chamber when the pneumatic devices are operated and a pneumatic means under the influence of the pressure in the chamber for maintaining the valve in operated position.

11. A record controlled musical instrument comprising a tracker, a pneumatic, a main source of tension, a valve for controlling the connection of the main source of tension with the pneumatic, a chamber, pneumatic devices for controlling the movement of the valve in one direction and connections for causing a change in pressure in the chamber when the pneumatic devices are operated, a pneumatic means under the influence of the pressure in the chamber for maintaining the valve in operated position and a tracker controlled pneumatic for overcoming the influence of the pneumatic means.

12. A record. controlled musical instrument comprising a tracker, a pneumatic, a main source of tension, a valve for controlling the connection of the main source of tension with the pneumatic, a chamber, pneumatic devices for controlling the movement of the valve in one direction and con nections for causing a change in pressure in the chamber when the pneumatic devices are operated, a pouch in the chamber and connections to the pneumatic devices for controlling the pressure to hold the same in operative position, said connections being controlled by the position of the pouch.

;13.A valve vmechanism comprising a block having a tension chamber, apneumatic exposed to the pressure therein, a valve chamber having two ports, one of which is to the tension chamber, a valve in the valve chamber having operative connection with the pneumatic, a connection from the pneumatic for controlling the pressure vtherein, the block having flD-aUXilifiTy chamber with a duct leading therefrom to the valve chamber,,the valve chamber also having a power duct leading therefrom, a pouch within the auxiliary chamber and covering the openings of two ducts, one leading to vthe-edge of the block and the other leading to the pneumatic,a releasingpneumatic in position to cause thepouch to close the openings, the releasing pneumatic having a duct leading therefrom.

ll. A valve mechanism comprising a block having a tension chamber, a pneumatic exposed tot-he pressure therein, a valve'chamher having two ports, one of which is to the tension chamber, a valve inthe valve chamber having operative connection with the pneumatic, a connection from the pneumatic for controlling the pressure therein, the block having an auxiliary chamber with a duct leading therefrom to the valve chamher, the valvechamber also having a power duct, leading therefrom, a pouch within the auxiliary chamber and covering the openings of two ducts, one leading to the edge of the block and the other leading to the pneumatic, a releasing pneumatic in position to cause the pouch to close the openings, the releasing pneumatic having a duct 1eading therefrom, the block being divisible to expose two of'the chambers to view.

Intestimony whereof I affix my signature.

TOLBERT .F. GHEEK. 

